diff --git a/src/middleware/rest/SlashCommandManager.js b/src/middleware/rest/SlashCommandManager.js
index 9d12c4d..3f0fb11 100644
--- a/src/middleware/rest/SlashCommandManager.js
+++ b/src/middleware/rest/SlashCommandManager.js
@@ -33,7 +33,7 @@ class SlashCommandManager {
         if (!guilds.length) guilds = this.client._options.discord.slashCommands.developerGuilds;
         
         const cmdHash = hash(commands);
-        for (const guild of guilds) {
+        for (const guild of [...guilds]) {
             // Skip guild update if hash is already up to date
             if (this.hash.guilds[guild] === cmdHash) guilds.splice(guilds.indexOf(guild), 1);
             // else update hash